NEUTRALINO-NUCLEON SCATTERING REEXAMINED

被引：309

作者：

DREES, M ^{[1
]}

NOJIRI, MM ^{[1
]}

机构：

[1] KEK,THEORY GRP,TSUKUBA,IBARAKI 305,JAPAN

来源：

PHYSICAL REVIEW D | 1993年 / 48卷 / 08期

关键词：

D O I：

10.1103/PhysRevD.48.3483

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a detailed discussion of the elastic scattering of a supersymmetric neutralino off a nucleon or nucleus, with emphasis on the spin-independent interaction. We carefully treat QCD effects on the squark exchange contribution. In particular, we identify a class of terms that survive even in the absence of mixing in both the neutralino and squark sectors; the corresponding quark and gluon operators also appear in analyses of deep-inelastic lepton-nucleon scattering (''twist-2 operators''), so their hadronic matrix elements are well known. We also reemphasize the importance of mixing between the superpartners of left- and right-handed quarks, and of the contribution from the heavier sr-alar Higgs boson. We use our refined calculation of the scattering amplitude to update predictions of signal rates for cosmic relic neutralino searches with germanium detectors. In general the counting rate varies strongly with the values (even the signs) of model parameters; typical results lie between a few times 10(-4) and a few times 10(-1) events/(kg day).

引用

页码：3483 / 3501

页数：19

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